Pump assembly



Jan. 30, 1940.

" R. BUNCH PUMP ASSEMBLY Filed Sept. 29, 1937 2 Sheets-Sheet 1 GnsAseLEVEL E INVENjIIEiR.

R a 'LETLC BY M AT'FORNEY.

Jan. 30, 1940. BUNCH 2,188,646

PUMP ASSEMBLY Filed Sept. 29, 1937 2 Sheets-Sheet 2 INVENTOR. 7

BY I q I 10 in rural districts.

Patented Jan. 30, 1940 UNITED STATES r TE-N'T OFFlCE 2,188,646 PUMPASSEMBLY Ray Bunch, Los Angeles, Calif. Application September 29,'-1937;Serial No. 166,320

- 4Claims.

The purpose of'this invention is to provide a mechanism capable ofeffectively forcing lubricant into bearing part's of machinery and ithas particular use in lubricating automotive parts in that vehicles areoften far from stations having proper facilities toforce lubricant intoall bearing surfaces. "To effectively grease automotive parts, thegrease must be under high pressure, and ordinarily sufiicient pressureis not available The device herein described has been designedespecially for carriage upon trucks and automobiles so that they can belubricated thoroughly and quickly while in the field or on the road.

Construction work necessitating the use of mo bile machinery in ruraldistricts where modern lubricating means are not available, has made itnecessary to evolve a system of this kind, and I have particularreference to districts where new roads, dams and canals are beingconstructed and where lumbering is engaged in.

Applicants invention is not limited to the feeding of lubricant, but canbe. usedfor feeding fuel and other lightliquids to desirable places, forinstance: in keeping a container supplied with fuel as a carburetor inan automobile, or directly feeding fuel into a furnace or other place*where it is burnt. e

The uses to which such a pumping deviceca'n be successfully employed-areunlimited; Applicant anticipates its use as a power'means in theoperation of controllingand synchronizing devices useful in submarines,dirigibles, aeroplanes, battleships, army tank-stand even in hospitalsfor application of pressures and vacuums in the treatment of variousailments requiring pulmotors and other equipment which are coming moreand more into general use.

Heretofore, diaphragmtypeof pumps have been in extensive use andrequired ratherfrequent renewal of parts because the operating meanswere" mechanical and slight wear wouldput thepump out of service.Applicantis pump is designed to avoid such wear in that it operatesthroughthe differentiation of air pressures, thus rendering much longerservice.

An object of the invention is the provision of lubricating means.suitable for carriage upon trucks and automobiles forlubricatingjautomobiles, trucks and road machinery, power shovels,draglines, tractors and the like.

1 Another object of the invention is theprodtiction of an eifective andlong-lastingfeeding device for forcing liquids or fluids into containers.orplaces-ofserViCe and use;

tion in anymanner whatsoever, except as limitedby theappended claims. I

Figure "l of the drawings show a longitudinal section of an assembly forapplying'pressure to a lubricanttobe conducted to bearing surfaces.

Figure 2 shows an elevation partly in section of the lubricantpumpingmeans and associate parts.

Figure3 shows'insection a detail of the valve mechanism takensubstantially on the line ;33 of Figure 4. I

Figure 4 shows an elevational view of the valve partly in section.

Figure 5 shows a valve view, and I Figure 6 shows another detail of thevalve in perspective view.

As shown in Figure 1, casing or cylinder I, of metal or other 'suitablematerial, has a top or can 2 which is removable from the cylinder, thetop being provided with integral flanges 3 and 4 spaced apart to receivethe top end of the cylinder intelescoping relation so as to make a tightfit. The cover maybe provided with a vent, if 5 desirable. The bottom 5is fixed to the cylinder I by any'suitable means, but in'this case, itis held to the cylinder by the crimped section 6 which engages theentire flange. 5 of the peripheryofthe bottom.

This casing or cylinder holds fuel or lubricant which may be any of thehydrocarbons, such as gasoline, grease, oil'or another known lubricatingor fuel substance. The bottom of the cylinder must, therefore, be liquidtight and any suitable filler or packer may be used above the joints tomake it so.

Within the cylinder and emerged in the lubridetail in perspective 25cant is thepumping and valve assemblynowto closure plate lllheld to thebottom of the cham- 5'5 hers I by bolts 5 l in an obvious manner. In thecenter of this plate, a boss is provided to receive a bolt l2 whichpasses through the bottom 5 of the cylinder so as to hold the valve andpump assembly in a central position with respect to the cylinder. Themotor chamber 8 has a top wall section it configurated as an invertedcupwhich is provided with flanges M to be fastened to flanges l5 of thewall section 9. The chambers 8 and l are separated by the wall I6 whichwall may be integral with the walls 9. In the chamber 8 there isprovided a motor having a reciprocating element or flexible diaphragm H,which has, its outer periphery tightly held between the flanges M and 55as by the nut and bolts l8 which are spaced entirely around the flangesl4 and Hi. If gaskets should be found necessary,-they may be placedbetween the diaphragm and the flanges It and H5 in order to insure ahermetic seal. The diaphragm ll may be made of any suitable gasimpervious material which has sufficient flexibility to freelyreciprocate in the chambers 8 and 8a for a long period of time withoutbreaking down. Such a material may be any of the Well known speciallytreated fabrics.

In order to give stability and rigidity to the central portion of thediaphragm and make it suitable for anchorage to other operating parts,metallic pan-like washers l9 and 20 are provided upon both sides of thediaphragm and held together by the internally and externally threadedsleeve unit 2| having the nut 22.

Screwed to the inner part of the sleeve unit is a tube 23 which extendsthrough a packing gland 8' at the top of the chamber 8 and has fixed toits outer end a plunger rod 25 which extends through a head 25' andreciprocates in an upper tubular cylinder 26 which is fixed to the head.A packing gland 2'! is provided where the plunger enters the tubularcylinder. Fixed upon opposite sides of the head 25. and dependingtherefrom are cylinders 28 and 28 which have fin-like stiifeners 30 andflanges 3! which are fixed to bosses 32 of the element lll as byextended bolts and sleeves 33. Within the cylinders 28 and 2% arepistons or plungers 34 and 35 respectively which pass through the upperpacking gland assembly 36. The upper and outer ends of these pistons arefixed to a travelling yoke 3'! as by nuts 38 screwed upon the threadedends of the pistons.

The travelling yoke 31 is of annular configuration and has fixed theretopush rods 39 and 40, better shown in Figure 2, and these rods havereduced diameters at their upper ends for reception in bores of'the yoke3'! and are provided with nuts 4! which fix them to the travelling yoke.The bottom ends of the rods 39 and 40 are fixed to an elongated yoke 42as by bolts or welding and has its center bored to receive the tube 23in any suitable manner as by a welded orthreaded connection.

The apparatus just described is so designed and connected that theplungers 25 and 34 and 35 reciprocate in unison with the diaphragm I1 sothat when the plunger 25 is on its suction stroke in cylinder 26, theplungers 34 and 35 are on their compression stroke.

The chamber 1 is an air chamber semi-cylindrical in shape and has a flatwall 43 on one side upon which is fixed and supported the valve whichcontrols the operation of the diaphragm i1. This valve includes a casing44, better shown in Figure 5, which has a plate 45 fixed thereto in anysuitable manner, see Figure 2, the plate havto the pin 10.

ing-holes through which are passed bolts 46 which screw into the wall 43to support the entire valve assembly.

The valve casing is provided with passages 41, 48 and 49 which open tothe inner face of the casing to form ports 41', 48 and 49' and the otherends open to'ducts or pipes 5!}, 5| and 52 respectively; the pipe 50extending to and through the upper wall of the chamber 8a, the pipe 5iextending through the wall of the cylinder l to suitable power meanswhich is, preferably, a vacuum pump or the vacuum system of an internalcombustion motor, and the duct 52 extends to'the chamber 8a beneath thediaphragm H. A pipe '53 extends through the wall of the cylinder I andinto the chamber 7, as shown. The pipes 5| and 53 where they passthroughthe wall of the cylinder are provided with suitable packing glands 54and 55 toprevent the contents of the cylinder from escaping through thewall at these points.

A reciprocating or swing slide .valve 56, shown in Figure 6, has an earsection 51 with a bore 58 which is pivoted to a fixed bearing pin 59which permits the element 56 to slide in a path across the ports 41248and 49. This slide valve element has a cavity til which has suflicientlongi: tudinal length to bridge any two of the adjacent ports 41', 48'and' l9' so as to permit either the ports 41' and 48' to be inconnection for passage of fluid therethrough, or to bridge the ports. 48and 49 to permit passage of fluid through them. To preventthe slidevalve from going beyond certain predetermined limits, a finger GI isprovided rigidly fixed thereto as shown which rides in the limited spacebetween the stops 62 and 63 which are fixed to the valve casing. Thesliding valveis provided with beveled push bosses 64,,and 65 to beengaged by a rocking element 66; the element 66 being provided withspaced fingers 61 and 68- at a predetermined angle from one another,substantially as shown, so that the finger 68 will force the slide valveto connect ports 41' and #18 whereas the finger 67 whenin contac t withthe boss 64 will force the slide valve, in position to connect the ports48 and-I92 p .To reciprocate the element 66, an arm. 69 is, fixedthereto, as shown, which-is provided with a fixed pin 70 at one endthereof, the pin 10 ridingin an elongated slot H of a link 12 whichhasone end pivoted to the lower end of a. push rod I3 by the eyeconnector and pin 14. Push rod 13 reciprocates 'in the tube 23 andcarries a collar 15 that is secured to rod 13 by pin or otherwise. Bythis arrangement, the slide valve is rocked to. and fro when thediaphragm ITis raised and to a' slotted connector coupling 82 whichispivoted The plunger 8| is continually 70 urged outwardly from the tubeby a compression: spring 83 at the closed end of the tube. By this varrangement, as can readily be seen, the slide valve 56 is urged into aposition to cover ports 41 and 48'. The said ports not beingdisconhected'untn the push" rod 13' is forced upward by the diaphragm VWhen po'rts'l'l and 49r are not covered by the slide'va1ve'56,atmospheric "air is admitted to said port's since'they are open to -thechamber 1 which is?" alwayscor'ine'cted to l atmosphere by the pipe 53."When 'fpo-rts Q41" and 48' a're connected together the slide valve, airis drawn through the passage-41, 'pipe' 58- and from above the diaphifaj'j|"|., bgcause the port48" is-connectedto tnepa sage lli and the pipe,5| which is connected' to the vacuum system of the engine. Thisconnection will raise the diaphragm ill because when the slide valve isin this position; the-port 49' is open to the atmospheric chamber 1, andthis permits atmospheric pressure to enter beneath the diaphragm H bythe way of passages p 52 and 49. When the slide valve is covering ports48 and 49', the reverse operation of the diaphragm takes place in thatthe air is sucked from beneath the diaphragm via passages 52, 49, 48 and5| and atmospheric air is admitted to the port 41' which conducts theatmospheric pressure via pipe 58 into the top of the chamber 8a.

A pipe 84 may be connected to any supply of the fluid to be pumped, butin the present case, the open receiving end of such pipe is slightlyspaced from the bottom 5 of the cylinder I which contains the lubricant,and branches out to form pipes 85, 86, 81 and 88. The top of thecylinder 8 26 is configurated and arranged to receive one 9 end of thepipe 85 and also to form a seat for a ball valve of an extended part 9|of the cylinder 26. The

' extension 9| is provided with pipe connecting means for the pipe 88,and is threaded internally and externally at. 92,. The internal threadsreceive a' flexible pipe 93 through which lubricant is pumped from thedescribed apparatus. The end of the flexible pipe may carry a hand valve94 having a nozzle or teat 95 to fit various lubricant connections ofthe device to be lubricated in I a manner well known. Obviously, theteat would be dispensed with when the pump is put to other uses.

The external threaded part of the fitting 9| receives a wing nut 96forholding the cover 2 tightly upon the cylinder I. Pipes 86 and 81 1connect respectively to the bottoms of the cylinward the flexible pipe93.

described, it can readily ders 34 and 35. A section of the pipe 84,between pipes and 8B is provided with a well known spring check valve91. Similar check valves are also provided in pipes 85, as shown at 98,and in the pipe 88, as shown at 99, so as to permit the lubricant tomove in one direction only, to-

plunger 25 will draw lubricant into the cylinder 26 via pipe 85 whilethe plungers 34' and 35 will force lubricant out of their respectivecylinders through the pipes 86 and 81 and 88 into the fltting 9|, andhence into and through the pipe 93. By such a continual feed of thelubricant through the pipe 93 under pressure, depending upon the degreeof vacuum through the pipe 5| and the area of its respective motiveparts, high pres- 89 which operates in a chamber 98 themotor in chambers8 and 8a gives the pump,

which if of relatively small area, great force which results in placingthe lubricant in flexible pipe 93 under high pressures.

A differential of pressures of about three pounds between atmosphericair and a partial vacuum over diaphragm area of only about eighteeninches would mean an approximate force of fifty-four pounds on eachstroke. Although pipes 5| and 53 are disclosed as being connected tovacuum and atmosphere, respectively, it is to be understood that air orother fluid under pressure may be utilized as power. for operating themotor. The pipe 53 can be connected to a fluid pump, and the pipe 5| toatmosphere and the device successfully operated for the purposesintended.

Thus it will be seen that I have provided a pump assembly that isrelatively simple in construction, inexpensive of manufacture and veryeffective in performing the functions for-which it is intended.

It will be understood that minor changes in the size, form andconstruction of the various parts of --my improved pump assembly may besubstituted for those herein shown and described without departing fromthe spirit of my invention, the scope of which is set forth in theappended claims.

ing apparatus, said'casing enclosing a valve, a

housing secured to and superimposed on the valve casing and enclosing amotor controlled by the valve, a unit comprising a plurality of pumpsfixed to the top of the superimposed housing, means connecting the motorwith the pumps to operate the latter, a supply pipe leading to saidpumps from a reservoir of low pressure fluidand a conduit leading fromthe pumps to a valve device.

2. The apparatus recited in claim 1, said means comprising a hollowreciprocating tube, a rod concentrically arranged in the tube andconnected to the valve for timing its operation.

3. In a fluid feeding device, a pump and a motor connected in directrelation with each other, said pump having one or more crossheads whichoperate one or more plungers for moving fluid,

said motor having an element which reciprocates' and operates the pump,a valve operated by the reciprocation of said reciprocating element andcontrolling fluid pressure on either side of the reciprocating elementso as to cause it to reciprocate, a fluid pressure tight housing en'closing said valve, an air conduit connected to said'housing, a fluidpressure tight housing enclosing the pump reciprocating means, a vacuumduct communicating with the housing for the means and said pump.

4. In a fluid feeding device, a pump and a motor connected in directrelation with each other, said pump havingone or morecrossheads whichoperate one or more plungers for moving thefluid, said motor-having anelement which reciprocates and operates the pump, a ,valve op erated bythe reciprocation of said reciprocating element and controlling fluidpressure on either side of the reciprocatingelement. so as ;.to, causeit to reciprocate, one of said crossheads; being connected with aplurality of plunge'rs and an other crosshead being connected with asingle plunger and which latter has a face area equal to the combinedface areas of the other plungers-L 19 RAY BUNCHQ:

